/Engine/Plugins/Importers/USDImporter/Source/USDExporter/Public/USDConversionBlueprintLibrary.h
Returns the source asset for aUFoliageType. It can be aUStaticMeshin case we're dealing with aUFoliageType_InstancedStaticMesh, but it can be other types of objects.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Meta=(ScriptMethod), Category="USD Foliage Exporter") static [UObject](API\Runtime\CoreUObject\UObject\UObject) * GetSource ( [UFoliageType](API\Runtime\Foliage\UFoliageType) * FoliageType )